2001021202220 has 96 divisors (see below), whose sum is σ = 4440103180800. Its totient is φ = 757505649600.

The previous prime is 2001021202183. The next prime is 2001021202237. The reversal of 2001021202220 is 222021201002.

It is a junction number, because it is equal to n+sod(n) for n = 2001021202195 and 2001021202204.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144169241 + ... + 144183119.

It is an arithmetic number, because the mean of its divisors is an integer number (46251074800).

Almost surely, 2^{2001021202220} is an apocalyptic number.

2001021202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001021202220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2220051590400).

2001021202220 is an abundant number, since it is smaller than the sum of its proper divisors (2439081978580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001021202220 is a wasteful number, since it uses less digits than its factorization.

2001021202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14996 (or 14956 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 2001021202220 its reverse (222021201002), we get a palindrome (2223042403222).

The spelling of 2001021202220 in words is "two trillion, one billion, twenty-one million, two hundred two thousand, two hundred twenty".